Patent US2935294A successfully refreshed from Google Patents.
US2935294A
Expired / Lapsed
US
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Double wall turbine shroud
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1957-01-22
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Granted: 1960-05-03
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Expires: 1977-01-22
Abstract
No abstract record available.
Inventors
- 👤 Pierce T Angell
- 👤 James C Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:04
CPC Classifications
F; F01; F01D; F01D21/00; F01D21/04; F01D21/045; F05; F05B; F05B2260/00; F05B2260/30; F05B2260/301; F05B2260/3011; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2390506A
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US2657901A
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US2685429A
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US2742224A
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US2775864A
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US2759428A
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US2802618A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |